Electric-railroad bonding system.



G. H. LINDSEY.

ELECTRIC RAILROAD BONDING SYSTEM. AIILIGATION-IILED MAY 26, 1909.

962,966. Patented June 28, 1910.

W H k, ILL

A? M I? ll M02 I l 5 Summer Georyelffiindseg Witnaooeo GEORGE H.LINDSEY, OF AUSTEN, WEST VIRGINIA.

ELECTRIC-RAILROAD BONDING SYSTEM.

Specification of Letters Patent. Patented June 28, 1910.

Application filed May 26, 1909. Serial No. 498,529.

. Bonding Systems, of which the following is I a specification.

This invention relates to bonds for connecting electrical conductors, asrails which are used for return current.

The object is to provide a device of this character which is simple andeasy of application, and which will not be liable to displacement.

The invention consists in the various details described and claimedhereinafter, and illustrated in the drawing forming part of thisspecification, in which,

Figure 1 is a side elevation of the joined ends of two rails showing theapplication 0t my invention, Fig. 2, is a plan view partly in section onthe line m-:u of Fig. 1, Fig. 3 is a perspective view of one of thebonds. Fig. l is an enlarged view of the bolts. 1n the drawings '1 and 2represent the meeting ends of two rails, and 3 and 4.- the splice bars.These rails are provided with the usual bolt openings 1 and 2. Each ofthe two bolts Sand 10 ncarcst'the joint of the rails is provided with alongitudinal groove 14 to receive one of the parallel arms of theU-shaped bond 9. Partial threads 12 are cut on the inner faces of thearms 11 and 12 of the bond which aliiie with the threads of the bolts,and form continuous threads for the nuts 13. The splice bar 3 isprovided with a groove 5 en. uding from the opening (3 to the opening7'. The connecting member of the bond 9 is adapted to lic within thegroove 5 so that the bar 4 will lie flush against the webs of the rails.

To apply the bond, the rail joint is made, the arms 11' and 12 insertedin the bolt openings so that said bond straddles the joint of the rails.The bolts 8 and 10 are and l l l l l l then inserted in such manner thatthe arms 11 and 12 enter the grooves l t in the bolts, the elbows 11 and12 of the bond abutting against the walls at the inner ends of saidgrooves. The nuts 13 are then applied to the bolts and screwed home, thethreads engaging the threads of the bolts and the arms of the bond andsecuring a firm engagement.

The bond cannot become loose from the free ends for the reason that thenuts hold same, nor from the inner end because the elbows abut againstthe end walls of the grooves. The groove 5 in the splice bar alsoinsures against vertical movement.

It will thus be seen that a very ellicientbond is secured.

Having thus described the lnvention what is clauned as new 1s:

1. In a device of the class described a 'splice bar having alongitudinal groove extending between two bolt openings, a U- shapcdbond having its connecting member fitted in said groove, the arms ofsaid bond being partially threaded upon their inner faces, connectingbolts having grooves to receive the arms of the bond, and nuts thread--ed upon the bolts and bond arms.

2. In a device of the class described and including abutting rail endsand splice bars engaging-the same, one of said splice bars being rovidodwith a longitudinal groove extending between two bolt holes proximate tothe rail joint, a U-shaped bond having its connecting member fitted insaid groove and arms extending through the bolt holes, said arms beingpartially threaded upon their inner faces, bolts longitudinally groovedto engage the bond arms, and nuts threaded upon the bolts and the bondarms jointly.

In testimon whereof I afiix mysignature in presence 0t two witnesses.

CLINT WlLns, WV. S. MONTGOMERY.

